molsysmt.pbc.get_lengths_and_angles_from_box

molsysmt.pbc.get_lengths_and_angles_from_box(box, skip_digestion=False)

Return box lengths and angles from a 3x3 box matrix or an array of boxes.

Parameters:

box (array-like) – A single box with shape (3, 3) or an array of boxes with shape (n, 3, 3). Vectors correspond to the three box edges: v0, v1, v2.

Returns:

• lengths, angles –

  • lengths: |v0|, |v1|, |v2| in the same units as the input (often labeled as a, b, c in other libraries/software).

  • angles: (alpha, beta, gamma) in radians where:

    alpha = angle between v1 and v2, beta = angle between v0 and v2, gamma = angle between v0 and v1.

    This matches the conventional nomenclature (alpha between b and c, beta between a and c, gamma between a and b).

• .. versionadded:: 1.0.0